Id.zip May 2026
Adding the extra four digits can speed up delivery.
If you need to look up a specific code for an address, use these official resources: Id.zip
Use this for a more precise 9-digit code (e.g., 83702-1234). Quick Reference for Major Idaho Cities Primary ZIP Code Boise Pocatello Idaho Falls Twin Falls Coeur d'Alene Best Practices for Addressing Mail Use All Caps: The USPS prefers "ZIP Code" in uppercase. Adding the extra four digits can speed up delivery
The ZIP Code should always be the very last part of the address line. Id.zip
Pinpoint a specific local post office or delivery area. How to Find a ZIP Code in Idaho
